What is h in shoe size?

"H" in shoe size usually refers to the width of the shoe. It is an indication of the shoe's width fitting. "H" size is wider than the standard "D" width and is often called a "wide" fit. Generally, shoe sizes with wider widths are denoted by a letter, rather than a number. The letter H usually stands for a fairly wide width as compared to the standard sizes. Some brands use different letters such as E, EE, or EEE to indicate various widths. A person with wider feet would benefit from a wider shoe, and thus would choose an "H" size for a comfortable fit.